Air-valve for carbureters



P. A. ANDERSON. A AIR; VALVE Foa CAHBURUERSA. vIPFLICA`|'|0N FILED JAN. 23.1917.

Patented pr. 26, 1921.

narran sraras earner carries.

PER AUGUST `AlTDl?.BSCN, OF NEW YORK, N. Y.

AIR-VALVE FOR CARBURETERS.

retenes.

Application filed January 23, 1917. Serial No. 143,944.

To all whom it may coacem: n

Be it known that I, Pini AUGUST ANDER- soN, a citizen of the United States, and resident of the borough of Manhattan, city, county, and State of New York, have invented certain new` and useful lmprovements in Air-Valves for Carbureters, oit

which the following is a specication.

My invention relates to air valves for carbureters andhas for its object to provide a simple arrangement adapted more particularly :tor eiiiciently controlling the auxiliary air inlet of carbureters.v My improvement further contemplates aV construction in which the valve may be readily kregulated to produce results of maximum etliciency in the carbureter under all atmospheric con.- ditions and with gasolene of different qualities. A further purpose of'my invention isk to provide an arrangement in which the parts are readily accessible when operatively combined with the carbureter and in which all of said parts are combined in the form of a unit which-is easily connected.

with and disconnected Jfrom the carbureter.

Other objects of my improvement will ape pear from the description hereinafter and the features of novelty thereof will be pointed out in the appended claim.

Reference is to be had to the accompanying drawing which illustrates anexainple of my invention `operatively combined with a carbureter of conventional design `and in which Figure 1 is a vertical section ot a carbureter and improvement and Fig. 2 is a horizontal `section on the line 2--2 of Fi 1.

s shown in the illustrated example the 'g ing with a spraying nozzle 13 to'control the communication between the oat `chamber 7 and the mixing chamber 10 as shown 'in Fig. 1. In addition the carbureter comprises the usual primary air inlet M and auxiliary air inlet 15 leading to the mixing Specicaton of Letters Patent. Patented ipI.` 26, 1921.

. chamber and further is provided with the customary throttle disk 16 located between the mixing chamber 10 and outlet 11 and operated in the welly known way. The parts so far described are those customarily included in carbureters and may be of any well known type, it being understood that any additional parts not'vshown and `described which ordinaril form a part of such carbureters may be included if desired, the type or `construction,

In other words the latter is adapted to be operatively combined` with carbureters, the specilic construction of which may be entirely different from that shown and described. j LMy improvement comprises a tubular shell 17 provided at intervals with lugs 18 apertured to accommodate screws or other fastening devices 19 whereby said shell is operatively combined with the 'carbureter the illustration showing said shell 17 connected with the auxiliary air` inlet 15 so as to form ,a continuation thereof. At its upper end the shell 17 is internally screwthreaded "to accommodate an externally screw-threaded cap 20 having air inlets 21 and formed at its inner end with a valve seat22 the latter being thuslocated between the endsV ofsaid shell 17." The saidI cap 2O is also provided with an axialfsleeve 23 which forms a bearing for the valve stem 24 slidable therein and carrying a .valvey -25 at its innerend, the valve 25 coperating with the seat 22 to controlthe communication between the shell 17 and the air inlets 21. At its outer end portion the stem 24x-is screw-threaded as indicated at 26 for the accommodation of an adjusting nut 27, the latter having a reduced portion 28 and an enlarged preferably knurled operating head 29. The head 29 forms an abutment for one end of an outer and relatively light coil spring 30 which surrounds the stem 24 and has its other end resting upon or in engagement with the cap 20. A Ysecond or inner coil spring 31 relatively heavier than the spring 30 surrounds said stein 24 within the spring 8O and rests upon the free end of the sleeve 23 the heavier spring 31 in the illustrated adjustment of the parts `as shown in Fig. 1 terminating at a distance below and in the path of the portion 28 ofL the adjusting nut 27. In addition Vto the above` the construction may include a pin 32 cara ofthe carbureter having nothing to do with ,my invention.`

ting auxiliary air to said mi'xing chamber 10 aswill be Vreadily lapparent'and providing the desired explosive mixture for delivery tothe engine or motor.. 'As l'ong'as the latter is operating -atlow speed, and assuming the parts of my improved valve struc! ture to be in the positions shown in Fig. 1, j

the valve will be operated as described only against the tension of the weaker spring 30, the movement of said valve 1n `this case being insufficient to'bringthe portion 28 of the nut 27 into engagement-with the relatively heavier spring 3l. Y-If the suction effect increases due to increasedV speed of themotor or engine, the valve 25 will be moved away from the seat 22 to a greater extent and finally to such a degree as to bring the portion 28 of" the nut 27 into contact with the end of the heavier spring 31'. Ifthe movement of the valve 25 away from its seat 22 is sufficiently great this heavier'spring 31 will also be compressed andwill thus add the force of its tension to that of the lighter spring 30 as a resistance to the opening of said valve. In other words, in this case, the tension tending to resist the opening of said valve is increased with the result that the ,admission of too great an amount of air and the consequent formation of a poor mixture for -the intended purpose is prevented and a mixture 'rich in gasolene and particularly adapted for high speed or other special conditions is always automatically provided.

The tension of the spring 30 may be changed by simply adjusting the position of the nut 27 upon'the screw-threaded portion 26 of the stem 24 as willbe readily apparent. The adjustment of the nut 27 to increase the tension of the outer spring 3() decreases the distance between the portion 28 and the end of the inner spring 31 and in someV cases may be such as to effect and increase the tension of the latter spring. In all instances 'an adjustment may readily be Vhad to efliciently meet the conditions imposedby the particular atmospheric condition Aexisting at the time or by .the quality of gasolene being used or by both of these factors. As the location of the adjusting nut 27 and connected parts is such as to make these elements readily accessible the necessary adjustments may be easily and quickly made as often as required with a minimum of effort and trouble. A mixture best suited to all conditions and neither too rich nor too weak is thus always obtainable in a simple mannerwhereby explosions of maximum power are obtained with the result that the motor Vor engine operates Vwith `a maximum of 'efficiency under all atmospheric conditions and regardless of the qual ity of the gasolene being used.

As the adjustment abovevmentioned takes place the rotation ofthe nut 27 may at times be communicated for instance to the spring 30 and in turn may thus tend to-rotatefthe valve 25 onfits axis.V Anyxsuch rotation of said valve is arrested by the'pin 32 incooperation with thewalls .ofthe air'inlet y21 through which it passes,'so that Awhatever rotation of the valve may take place, the

extent thereofwill neverbegreaterthan the widthof said air inlet at `the-point wher the pin 32 is'located.

Furthermore by combining the shell 17, valve 25, valve seat 22 andadjustingmecha nism for instance las shown Ein the illustrated example these elementsmay be' readily connected with and disconnectedffrom the carbureter as a unit 1and without necessitating individual manipulation of any of such elements or theirdisconnection from` each other as `has heretofore been V"necessary. In addition'to this the valve seat 22 with the valve 25 may be readily disconnected from the shell17 and the valveparts and ring 2O in turn easily disassembled when for any reason this may be necessary. Cleaning, replacing and renewing of these parts as well as refinishing and'regrinding of the valve' and valve seat 'may'thus be accomplished with a minimum of difficulty and without disturbing any of the other parts of the valve structure lor of the carbureter. y

' My improvement may be readily adapted for use with any type 'of carbureter,l either of existing constructions or of specialmake and is at all times simple and efficient in 0peration yand not likely to get out lof order. My invention is also extremelyfsimple in construction and 'easy to produce whereby the cost of manufacture is -reduced t'oa minimum and furthermore requires no complicated adjustmentto insure satisfactory optively, a screw-threaded member adjustably mounted upon the screw-threaded portion of said stem whereby the tension of both springs may be adjusted and a pin carried l5 by said valve and extending through one of said air inlets and arranged, by Contact With the Walls thereof to limit the rotative move-` ments of said valve.

In testimony whereof I have hereunto set 20 my hand.

PER AUGUST ANDERSON. 

